MagicPlay is an open cross-platform audio streaming standard (think “HTTP for music”) that supports synchronized streaming to multiple speakers (like Sonos). For more details, see this Verge story. In the near future you’ll be able to buy WiFi speakers, TVs and other products that come with MagicPlay support out of the box. If you want to try MagicPlay right now, you can turn an existing device such as the Raspberry Pi into a MagicPlay device and stream music to it using doubleTwist Player for Android.
MagicPlay is an Open Source platform created by doubleTwist that establishes a universal way to stream music to wireless speakers, TVs, car audio systems and other connected devices, bringing music to the Internet of Things.
How does it compare to AirPlay?
MagicPlay has been described as the "Open Source AirPlay" and enables anyone to enjoy synchronized playback of music without investing in expensive proprietary systems such as Sonos or AirPlay-compatible speakers.